“I don’t want to get too big” is a sad sentiment from both men and women. It won’t happen, even if you slave to make it happen, by the way. Training for size is a full time career of obsession. No offense, but you don’t have it in you.
From women, there’s often an accompanying sentiment, something like “weights will make me big.” Mind you, this is generally coming from people who are currently carrying excess mass, and the “heavy weights” at which they balk are 20lb dumbbells.
Here’s a young woman @vilma__olssonwith a slender and moderate build, but squatting and deadlifting over 400lbs, and bench pressing over 255lbs. 255lbs is what her arms push, and her arms are tiny. She’s driven and training relentlessly to be as strong a competitive lifter as she possibly can be, and she still isn’t overbuilt. You’re living in a fairyland if you think that what isn’t occurring for this hard of a worker will accidentally happen to you.
You won’t get big. But you should get strong. Quit putting it off.